Efficient: LDO-free Power Supply for a 12-bit 500-MSPS ADC Reference Design
Description
The electrical performance of data converters depends on the cleanliness of their supply voltages. Linear regulators (LDOs) are commonly used but have low efficiency and high power loss: which is unsuitable for portable applications.Using a switch mode power supply (SMPS) instead: such as the TPS62231 and TPS62237: is a cost-effective and efficient power supply solution. Such a solution does not degrade the performance of the 12-bit ADS540x family of analog to digital converters (ADCs) and does not waste excessive power. The test report shows the Signal to Noise Ratio (SNR) and Spurious-Free Dynamic Range (SFDR) comparisons between the two power supplies: which demonstrate the same performance.
Features
- Efficiency increase from 47% to 83%Input current reduced from 620 mA to 350 mANo linear regulators (LDOs) required to cleanly power ADC12-bit performance maintainedSmaller DC/DC solution size than LDOsSupports 5-V input
Applications
- Oscilloscopes & digitizers
- Digital multimeter (DMM)
- Software defined radio
- Lab & field Instrumentation
- Spectrum analyzer
- Electronic warfare
- Vector signal transceiver (VST)
- Wireless communications test
Product Categories
- Power management
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Download the test file for PMP9767| Title | Updated | Type | Size (KB) | |
|---|---|---|---|---|
| PMP9767 Gerber | 18 Dec 2015 | ZIP | 1238 | |
| PMP9767 BOM | 18 Dec 2015 | 130 | ||
| PMP9767 Schematic | 18 Dec 2015 | 90 |